Re: [PATCH] powernow-k8 max speed sanity check

[Pavel Machek]

Hi!

> > > Are the middle values needed? What if you only use the min and max 
> > > fid/vid values, and always recalculate the stepping tables from those 
> > > values?
> > 
> > Well, 1600MHz operation is very nice, as it has significantly less
> > power consumption but pretty much same performance. It also does not
> > start CPU fan most of the time :-).  
> 
> Yes, 1600MHz would be nice, I agree.
> 
> But I meant calculating all the valid values inbetween min and max without
> relying on getting those values from the BIOS.

I do not think values can be calculated by some simple
formula. voltage/frequency relations may be quite complex..

> I guess the code already does that to figure out how many steps are needed
> to change between min and max?

Well, but it steps voltage first, then frequency [going up] or
frequency first, voltage then [going down]; middle values used by the
transitions are not too good if you want to be power-efficient.

								Pavel
-- 
Horseback riding is like software...
...vgf orggre jura vgf serr.
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